noun

assumption

assumption, supposition, presumption

Your assumption is incorrect.

Your assumption is incorrect.

He acted on the assumption that she would help.

He acted on the assumption that she would help.

The assumption of power by the new leader was swift.

The assumption of power by the new leader was swift.

an assumption that [clause] a belief that something is true, though there is no proof He made the assumption that the train would be on time.

on the assumption that [clause] because you believe that something is true We proceeded on the assumption that the report was accurate.

Synonyms: supposition, presumption, hypothesis

From Latin 'assumptio' (a taking up), from 'assumere' which is 'ad-' (to) + 'sumere' (to take).

An 'assumption' is something you 'assume' or take to be true, often without proof.

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